An improved Method of measuring the amount of Precipitum in connection with Tests with Precipitating Antisera

Futher experience with the method of measuring the precipitum obtained when experimenting with precipitating antisera has shown that finer degrees of reaction cannot be satisfactorily determined by means of the apparatus described by Nuttall. In the latter apparatus capillary tubes were used in whic...

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Bibliographic Details
Published in:The Journal of hygiene 1904-04, Vol.4 (2), p.201-206
Main Authors: Nuttall, George H. F., Inchley, O.
Format: Article
Language:English
Subjects:
Fingers
Precipitin tests
Rubber
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Summary:Futher experience with the method of measuring the precipitum obtained when experimenting with precipitating antisera has shown that finer degrees of reaction cannot be satisfactorily determined by means of the apparatus described by Nuttall. In the latter apparatus capillary tubes were used in which to measure the precipitum therein deposited. It is true that capillaries as far as possible of the same calibre were used, nevertheless we have found that different readings were obtained when experimenting with tubes of varying calibre, variations evidently due to physical causes which prevent an equal degree of “packing” of the deposit in tubes of unequal width. We have modified the method after finding that calibrated tubes of uniform bore gave more constant results, and have devised a simple apparatus which greatly facilitates the making of measurements.
ISSN:0022-1724
2396-8184
DOI:10.1017/S0022172400002126